Table 2

Characteristics of individual match observations categorised depending on short-term match congestion, and subgrouped based on the duration of the previous match exposure

Short-term match congestion (number of days between match exposures)
≤3 days4 days5 days6 days7–10 days
Observations, n (% of total observations)35 063 (26%)33 414 (25%)12 502 (9%)13 911 (10%)38 280 (29%)
Total match exposure, hours43 52941 63315 75317 68547 833
Mean match exposure time/observation, minutes (SD)74.5 (26.8)74.8 (26.7)75.6 (25.5)76.3 (25.5)75.0 (26.5)
Mean long-term match congestion*, hours (SD)6.7 (2.6)6.5 (2.5)6.3 (2.4)5.7 (2.3)5.2 (2.2)
All injuries, n1 0961 0403834201 144
Total injury rate/1000 hours (95% CI)25.2 (23.7 to 26.7)25.0 (23.5 to 26.5)24.3 (22.0 to 26.9)23.7 (21.6 to 26.1)23.9 (22.6 to 25.3)
Total injury rate ratio (95% CI)Reference group0.99 (0.91 to 1.08)0.97 (0.86 to 1.08)0.94 (0.84 to 1.06)0.95 (0.87 to 1.03)
Muscle injuries, n (% of all injuries)435 (40%)441 (42%)157 (41%)139 (33%)389 (34%)
Muscle injury rate/1000 hours (95% CI)10.0 (9.1 to 11.0)10.6 (9.6 to 11.6)10.0 (8.5 to 11.7)7.9 (6.7 to 9.3)8.1 (7.4 to 9.0)
Muscle injury rate ratio (95% CI)Reference group1.06 (0.93 to 1.21)1.00 (0.83 to 1.20) 0.79 (0.65 to 0.95) 0.81 (0.71 to 0.93)
≥90 min exposure in previous match
 Total match exposure, hours29 13428 49810 94312 57833 422
 All injuries, n721683277289760
 Total injury rate/1000 hours (95% CI)24.7 (23.0 to 26.6)24.0 (22.2 to 25.8)25.3 (22.5 to 28.5)23.0 (20.5 to 25.8)22.7 (21.2 to 24.4)
 Total injury rate ratio (95% CI)Reference group0.97 (0.87 to 1.08)1.02 (0.89 to 1.17)0.93 (0.81 to 1.06)0.92 (0.83 to 1.02)
 Muscle injuries, n (% of all injuries)283 (39%)303 (44%)125 (45%)95 (33%)266 (35%)
 Muscle injury rate/1000 hours (95% CI)9.7 (8.6 to 10.9)10.6 (9.5 to 11.9)11.4 (9.6 to 13.6)7.6 (6.2 to 9.2)8.0 (7.1 to 9.0)
 Muscle injury rate ratio (95% CI)Reference group1.09 (0.93 to 1.29)1.18 (0.95 to 1.45) 0.78 (0.62 to 0.98) 0.82 (0.69 to 0.97)
<90 min exposure in previous match
 Total match exposure, hours14 39513 1354 8105 10714 411
 All injuries, n375357106131384
 Total injury rate/1000 hours (95% CI)26.1 (23.5 to 28.8)27.2 (24.5 to 30.1)22.0 (18.2 to 26.7)25.6 (21.6 to 30.4)26.6 (24.1 to 29.5)
 Total injury rate ratio (95% CI)Reference group1.04 (0.90 to 1.21)0.85 (0.68 to 1.05)0.98 (0.81 to 1.20)1.02 (0.89 to 1.18)
 Muscle injuries, n (% of all injuries)152 (41%)138 (39%)32 (30%)44 (34%)123 (32%)
 Muscle injury rate/1000 hours (95% CI)10.6 (9.0 to 12.4)10.5 (8.9 to 12.4)6.7 (4.7 to 9.4)8.6 (6.4 to 11.6)8.5 (7.2 to 10.2)
 Muscle injury rate ratio (95% CI)Reference group0.99 (0.79 to 1.25) 0.63 (0.43 to 0.92) 0.82 (0.58 to 1.14)0.81 (0.64 to 1.03)
  • Injury rate ratios were analysed between short-term match congestion groups using ≤3 days as reference.

  • Values in bold indicate significant difference compared with ≤3 days.

  • *Long-term match congestion denotes total registered match exposure for the individual during the 30 days prior to an observation.